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Finding the Fourth Proportional to 561.36, 842.38 and 355.64

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Solution

The fourth proportional to 561.36, 842.38 and 355.64 is: 533.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.36 : 842.38 = 355.64 : x
  2. Step 2: Convert to fraction form
    561.36/842.38 = 355.64/x
  3. Step 3: Cross multiply
    561.36x = 842.38 × 355.64
  4. Step 4: Simplify right side
    561.36x = 299,584.02
  5. Step 5: Solve for x
    x = 299,584.02/561.36
  6. Step 6: Final answer
    x = 533.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.